Research paper · RP35

Lonely at Work

Workplace loneliness is common, costly, and strangely under-tested. Four controlled occupational trials measured loneliness after a workplace programme; a meta-analysis was not performed. This PRISMA-2020 systematic review asked what has been tested against workplace loneliness in employed adults from 2010 to 2026, and what worked. Searches covered PubMed, PsycINFO-equivalent sources, Scopus and Web of Science via public interfaces, Google Scholar, CTRI, ClinicalTrials.gov, UMIN-CTR and OSF. Eligible designs were randomised or otherwise controlled trials of any programme targeting loneliness or connection at work, with loneliness, belonging or social connection as outcomes. Four completed trials met the loneliness-outcome bar. All four were United States military samples. Two short leader-support coaching programmes (about 60–90 minutes) produced small reductions in employee loneliness against usual practice. One eight-hour social-resilience package produced a small decrease relative to an active control. One condensed unit-connection package of about three and a half hours did not change loneliness. Certainty of evidence is low to very low: few trials, high indirectness to civilian and Indian knowledge work, unblinded self-report, and attrition. No completed, peer-reviewed controlled trial of a workplace loneliness programme was found in India. The India-registered garment-worker pairing study remains unpublished. Until more trials exist, the honest claim is narrow. Brief leader coaching that teaches supportive behaviours has a replicated, small loneliness signal. A pooled effect size is not yet possible. Indian programmes should treat that signal as a starting hypothesis, not as product-market fit.